A selected summary of Southern California-related business litigation developments during the past week.

Motown Sued Over Royalties: Singers Jean Terrell, who replaced Diana Ross in the Supremes, and Mary Wells sued Motown Record Corp. and its general partners, Motown Management Corp. and MCA Record Ventures Inc., for more than $1 million in disputed royalties. The singers contend that Motown breached their contracts and engaged in unfair business practices by failing to pay royalties for their recordings and use of their names and for failing to disclose how royalty payments are calculated. Both suits seek an injunction against Motown. (Case Nos. BC-022712 Filed March 4 and BC-022930 Filed March 6.)